<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>
    <!-- react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入babel,将jsx转化成js -->
    <script type="text/javascript" src="../js//babel.min.js"></script>
    <!--  -->
    <script type="text/babel">
        // 创建组件
        class Weather extends React.Component{
            // 构造器函数
            constructor(props){
                super(props)
                // 初始化状态
                this.state={isHot:false,wind:"微风"}
                // 解决changeWeather中指向问题
                this.changeWeather=this.changeWeather.bind(this)
            }
            // render()方法
            render(){
                console.log("render");
                // 读取状态
                const {isHot,wind}=this.state;
                return (<h1 onClick={this.changeWeather}>
                    今天天气很{isHot?"炎热":"凉爽"},{wind}
                    </h1>)
            }
            // 
            changeWeather(){
                // console.log("changeWeather");
                const isHot=this.state.isHot;
                this.setState({isHot:!isHot})
                console.log(this)
            }
        }
        // 渲染组件
        ReactDOM.render(<Weather/>,document.getElementById("test"))
    </script>
</body>
</html>